How can an engine be oil and air cooled? air cooled i understand but oil cooled? ?

buell and bmw have oil/air cooled engines, how does the oil actually cool engine? my friend the motorcycle mechanic always said ';heat kills engines';, thanksHow can an engine be oil and air cooled? air cooled i understand but oil cooled? ?
Every engine is also oil-cooled. Air (or water in a water-cooled engine) takes away the excess heat that travels to the cylinder walls and the outside of the heads. The problem is that lots of heat remains in some parts such as the underside of the pistons. These are often cooled by jets of oil sprayed directly onto them. But even without specific oil jets, lubricating oil is constantly in contact with very hot engine parts so it inevitably absorbs some of their heat which cools the engine parts. This heats the oil which is often cooled by a separate oil cooler.





Some engines, like aircraft piston engines, or early Suzuki GSXR's actually circulate fresh oil around the outside of the cylinders and heads where it acts pretty much like water in a water-cooled motor. These engines carry more oil than average (7qts in the Suzuki's case) and are equipped with oil-coolers that are the size of water radiators.How can an engine be oil and air cooled? air cooled i understand but oil cooled? ?
Depends on the car and engine,





The oil in most cars is used as a lubricant to lessen friction on moving parts. (Friction makes the heat).





Some cars have oil coolers which is similar to a radiator which allows air to cool the oil passing through the tubes.





Engines also hove radiators which water is pumped through (By a water pump) and cooled.





Boats


Water cooled engines Have manifolds (Attached to exhaust system)which adapt the engine for marine use, water is pumped through the engine and manifolds and out the exhaust system.
An oil cooler is a much smaller strip (like a miniature radiator) attached to the frame. It is not meant to cool the engine but just to reduce the temperature of the oil which is in use by the engine.





The engine is cooled as usual by the fins on the cylinder head.





This layout helps to extend the life of the oil and thereby bring it up to a respectable level (normal interval) which would otherwise not be the case given the specs of the engine and the job that it is intended to perform.
the older Suzuki's such as the Katona and the GSXR's were oil cooled by circulating the oil through an oil cooler externally returning the oil to the engine cooler as others have mentioned, but they also have a pump that squirts the oil upwards on the bottom side of the pistons cooling the main point of friction, the piston and cylinder walls, this in turn makes all operation of the engine operate at a cooler range, and we all know friction is the action that wears parts. this is probably the best type of cooling for any reciprocating engine because it reduces wear and heat far greater then any other technique or engine design.
The main function of oil in all engines is to provide lubrication although it also helps cool the engine. Oil cooling is not enough on its own so all engines are either air or water cooled though air cooling is less common in car engines.


In some high performance cars though,there may be a separate oil cooler to help keep temperatures down.
since oil runs through the engine, if there is something that cools the oil, then the engine will run cooler.





air-cooled engines are what they are. they do not have a radiator and do not use coolant. they get their cooling through convection (when you ride, the wind blows through it and removes heat)





that is why air-cooled bikes will overheat if they sit in traffic for a long time.





turbocharged cars have an oil cooler to cool the oil that runs through the turbocharger
Ideally, the pistons, crank, con-rods, and cams all float on


a film of oil with no metal-to-metal contact.


How is the heat transfered out of those parts?


Even without an oil-cooler radiator, a lot of heat is lost from


the oil pan surface. (Most of them are finned to help with this.)


Any air-cooled engine is really partly oil-cooled.
A cooler separate ( Radiator ) cools the engine oil thus making the engine cooler like my vehicle
The oil gets into places not even water-cooling can such as crank shaft bearings and piston wrist pins, all that's needed now is an oil cooler to run air thru
They have oil coolers.. that act like radiators for your anti-freeze/coolant... Google it..